FREQUENCY CONTROL PRODUCTS
STRATUM III ULTRA MINIATURE SURFACE MOUNT TCXO
DFA S2-KHZ (5 V) & LHZ (3.3 V)
FEATURES
10 to 52 MHz
Stratum III compliant over -40 to 85°C up to
38.88 Mhz
Sonet Minimum Clock compliant over
-40 to 85°C up to 52 MHz
APPLICATIONS
Stratum III and SMC
2.4
5.3±0.1
7.2±0.2
5.08
0.9
3.2±0.2
5.08
Function
E/D
GND
Output
Vcc
DFA S2
1
2
3
4
4
1
3
2
PC board footprint
2.0
1.4
TYPE
Frequency Range
Standard Frequencies
DFA S2-KHZ
DFA S2-LHZ
10 to 20 MHz, soon to 38.88 MHz* (BSM & ESM up to 52 MHz)
12.8, 16.384, 19.44, 20, 34.368, 38.88 & 44.736 MHz
ELECTRICAL SPECIFICATIONS
supply voltage
supply current ( no load)
output load
duty cycle @ 50% level
rise/fall times (10 to 90 %)
high/low levels or output amplitude
start-up
tri-state control on pin 1
5V ±5%
≤
20 mA
HCMOS 15 pF or 2 TTL
45/55...55/45 %
≤
5 ns
≥
4.5 V/
≤
0.5 V
≤
10 ms @ 4.75 V
high or open = enable, low = high Z
3.3 V ± 5 %
≤
10 mA
HCMOS 15 pF or 2 TTL
45/55...55/45 %
≤
5 ns
≥
2.8 V/
≤
0.3 V
≤
10 ms @ 3.15 V
high or open = enable, low = high Z
FREQUENCY STABILITY
type
temperature
range
model
code
detailed tolerances [ ppm ]
stability versus:
temperature Vcc ± 5 %
ageing
overall
stability
Holdover
stability
24 hrs
drift
calibration
@ 25°C
Telcordia GR-1244 CORE Stratum III or ITU-T G.813 option 1
0 to 50°C AS3
all types
0 to 70°C BS3
-20 to 70°C CS3
-40 to 85°C ES3
≤
± 0.28
≤
± 0.1
≤
±3
over
15 years
≤
± 4.6
over
15 years
≤
± 0.37
≤
± 0.04
≤
± 0.8
Telcordia GR-253 CORE SMC or ITU-T G.813 option 2
all types
0 to 70°C BSM
-40 to 85°C ESM
≤
± 3.5
≤
± 0.3
≤
± 10
over
20 years
≤
± 20
over
20 years
≤
± 4.6
≤
± 0.5
≤
±1
DEFINITIONS
24 hours drift
24 hours holdover mode
GR-1244-CORE, GR-253-CORE or G.813
Over full temperature range and Vcc ± 0.5 %
ORDERING CODE
Example
*Please consult factory for availability
TYPE
DFA S2 SIII
REVISION
03
type + option code + frequency + model code
DFA S2-LHZ 19.44 MHz BS3
CHECKED
NE
DATE
25.02.2006
PAGE
09
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